Biology for IGCSE & O level - Inheritance (Section 1 - No. 29)
What is the purpose of the 'test cross' in genetics?
To determine the phenotype of an offspring.
To determine if an individual is homozygous dominant or heterozygous for a trait.
To determine the genetic makeup of an individual.
To determine the environmental factors affecting the trait.
Explication
A test cross is designed to reveal the genotype (homozygous dominant or heterozygous) of an individual displaying a dominant phenotype.